Earlier quoted context omitted.
I can assure you it is not. It's about $0.001 per solved captcha with 97% accuracy rate and refunds on failed ones, from the service provider I know of. I've even written one, it's not complicated and not expensive.
It is still the same rate. 2.2 ish for new recaptcha, too.
Unfortunately Google has some other metrics to detect bots (such as no cookies showing they've seen you before, etc), so it wasn't 100% reliable.